Catalytic Enantioselective Addition of Thioacids to Trisubstituted Nitroalkenes
作者:James P. Phelan、Evan J. Patel、Jonathan A. Ellman
DOI:10.1002/anie.201406971
日期:2014.10.13
The first example of a catalyticenantioselectiveaddition to and nitronate protonation of trisubstituted nitroalkenes to produce highly enantioenriched products with a tetrasubstituted carbon is reported. Thioacids added in excellent yields and with high enantioselectivities to both activated and unactivated nitroalkenes. The 1,2‐nitrothioacetate products can be readily converted in two steps to biomedically
Abstract Treatment of tertiary β-nitro alcohols I, obtained by addition of lithium α-lithionitronates to ketones, with acetic anhydride followed by 1 equivalent of potassium methoxide or t-butoxide, according to the nature of R2, gives α-nitroalkenes III in good yields.